Results 21 to 30 of about 4,637,784 (308)

أخطار السيول في مدينة القاهرة الجديدة باستخدام النمذجة الهيدرولوجية ثلاثية الأبعاد [PDF]

open access: yesMaǧallaẗ Kulliyyaẗ Al-ādāb Ǧāmiʿaẗ Būrsaʿīd, 2022
يعد الجريان السيلي واحداً من المشكلات الطبيعية التي تهدد أعمال التنمية، ويهتم هذا البحث بدراسة أخطار السيول في واحدة من أهم مدن إقليم القاهرة الكبرى وهي مدينة القاهرة الجديدة عبر استخدام الأساليب والتقنيات الهيدرولوجية المتطورة لمحاكاة خطر الجريان السيلي
صبحي عبدالحميد
doaj   +1 more source

A sketching interface for 3D modeling of polyhedron [PDF]

open access: yes, 2006
We present an intuitive and interactive freehand sketching interface for 3D polyhedrons reconstruction. The interface mimics sketching with pencil on paper and takes freehand sketches as input directly.
Wright, David   +8 more
core   +1 more source

3D BUILDING MODELING BASED ON LOW ALTITUDE MAPPING SYSTEM [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
The development and application of the mapping system with low altitude develops a new 3D city modeling technology means. 3D modeling method with low altitude has high efficiency, low cost, short cycle, strong maneuverability, convenient operation etc ...
Y. Zhou, Z. Lin, D. Gui, F. Xie
doaj   +1 more source

Optimising Point Cloud to Wireframe Conversion for 3D City Modeling [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Urban planning increasingly relies on structured 3D city models for analysis and decision-making, but while point clouds capture rich detail, their unstructured nature complicates direct use in CityJSON-based workflows.
S. Soo Chin Yee   +4 more
doaj   +1 more source

Towards Extending CityGML for Property Valuation: Property Valuation ADE [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
This paper introduces Property Valuation Application Domain Extension (ADE) within CityGML 3.0, aiming to integrate relevant indoor and outdoor 3D variables (cost estimation, view quality, etc.) for accurate property valuation.
S. El Yamani   +8 more
doaj   +1 more source

Application of Virtual Reality Technology and Unsupervised Video Object Segmentation Algorithm in 3D Model Modeling

open access: yesAdvances in Mathematical Physics, 2022
3D modeling is the most basic technology to realize VR (virtual reality). VOS (video object segmentation) is a pixel-level task, which aims to segment the moving objects in each frame of the video.
Hui Yang, Qiuming Liu
doaj   +1 more source

Chronological sequence of megalithic burial complexes of the Eneolithic in the Velikaya Aleksandrovka burial mound [PDF]

open access: yesМатериалы по археологии и истории античного и средневекового Причерноморья, 2022
The emergence of the earliest burial mounds in the Eneolithic of the North Pontic steppes (3900/3800—3500/3400 BCE) was accompanied by the construction of the earliest megalithic structures — cromlechs, the circular structures of which consisted of ...
Daragan, M.N.   +2 more
doaj   +1 more source

Modeling 3D euclidean geometry [PDF]

open access: yesIEEE Computer Graphics and Applications, 2003
This article compares five models of 3D Euclidean geometry-not theoretically, but by demonstrating how to implement a simple recursive ray tracer in each of them. It's meant as a tangible case study of the profitability of choosing an appropriate model, discussing the trade-offs between elegance and performance for this particular application.
Fontijne, D.H.F., Dorst, L.
openaire   +4 more sources

3D channel model in 3GPP [PDF]

open access: yesIEEE Communications Magazine, 2015
Multi-antenna techniques capable of exploiting the elevation dimension are anticipated to be an important air-interface enhancement targeted to handle the expected growth in mobile traffic. In order to enable the development and evaluation of such multi-antenna techniques, the 3rd generation partnership project (3GPP) has recently developed a 3 ...
Bishwarup Mondal   +11 more
openaire   +3 more sources

3D modeling with silhouettes

open access: yesACM Transactions on Graphics, 2010
We present a new sketch-based modeling approach in which models are interactively designed by drawing their 2D silhouettes from different views. The core idea of our paper is to limit the input to 2D silhouettes, removing the need to explicitly create or position 3D elements. Arbitrarily complex models can be constructed by assembling them out of parts
Rivers, Alec Rothmyer   +2 more
openaire   +3 more sources

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